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China,Tianjin,Tianjin,China China
Flexible air ducts are typically made of flexible plastic over a metal wire coil to shape a tube. Flexible ducts are very convenient for attaching air
spiral duct is used for ventilation system and air conditioning system of industrial and civil building. The function is to make the air circulation a
Persona de contacto Rachel Zhang
Dirección China, Tianjin, Tianjin
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